On Wed, Sep 03, 2008 at 12:36:55PM -0500, Eric Sandeen wrote: > Hm, I probably need to get the fallocate.h header file included if it's > not so that sys_fallocate can be used directly, but it is also exposed > via posix_fallocate in glibc - tested here on xfs just because xfs_bmap > is a handy way to show that it actually works via glibc: Uh, stupid me - I was looking for the wrong call. Rawhide _does_ have it. > > (c) Does ext4 preallocate in the background? A synchronous > > preallocate call isn't much use to virt-manager. > > It does not, but what is the concern? It doesn't take much time: > (on ext4 this time): > > [root@inode test]# time test_posix_fallocate testfile 0 10737418240 > > real 0m0.009s > user 0m0.000s > sys 0m0.009s OK ... I'm assuming though that the zeroes aren't all written to disk in this time, so that is exactly what I wanted. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones Read my OCaml programming blog: http://camltastic.blogspot.com/ Fedora now supports 64 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
